EX-99.A 2 d681773dex99a.htm EX-99.A EX-99.A

Exhibit A

AGREEMENT REGARDING THE JOINT FILING OF

SCHEDULE 13G

The undersigned, being duly authorized thereunto, hereby execute this agreement as an exhibit to this Schedule 13G to evidence the agreement of the below-named parties, in accordance with the rules promulgated pursuant to the Securities Exchange Act of 1934, to file this Schedule jointly on behalf of each such party.

Date: February 12, 2019

 

POLARIS VENTURE PARTNERS V, L.P.
By:   Polaris Venture Management Co. V, L.L.C.
By:  

*

  Authorized Signatory
POLARIS VENTURE PARTNERS ENTREPRENEURS’ FUND V, L.P.
By:   Polaris Venture Management Co. V, L.L.C.
By:  

*

  Authorized Signatory
POLARIS VENTURE PARTNERS FOUNDERS’ FUND V, L.P.
By:   Polaris Venture Management Co. V, L.L.C.
By:  

*

  Authorized Signatory
POLARIS VENTURE PARTNERS SPECIAL FOUNDERS’ FUND V, L.P.
By:   Polaris Venture Management Co. V, L.L.C.
By:  

*

  Authorized Signatory
POLARIS VENTURE MANAGEMENT CO. V, L.L.C.
By:  

*

  Authorized Signatory

JONATHAN A. FLINT
By:  

*

  Jonathan A. Flint
TERRANCE G. MCGUIRE
By:  

*

  Terrance G. McGuire
BRYCE YOUNGREN
By:  

*

  Bryce Youngren

 

*By:  

/s/ Max Eisenberg

Name:   Max Eisenberg
  Attorney-in-Fact

[This Schedule 13G was executed pursuant to a Power of Attorney. Note that copies of the applicable Powers of Attorney are already on file with the appropriate agencies.]